Anyone using a CTEK MUS 4.3 to keep their battery charged?

[Old Mopar Guy]

I’ve been using it for years without issue. Lately only the green light is on, blinking, indicating the charger is plugged in and powered up. No other lights lit, indicating the charger is not “seeing” the battery. Looking at possible causes according to the manual, none exist. The battery is fully charged, according to my other charger, connections are tight, etc. Any thoughts? Thanks.

 

[MikeD1]

Have you tried unplugging it, let it sit for a while then fire it up again & cycle thru the 'modes' ??

I had a Noco one that started acting strange like this, didn't last long after.
Been running an MXS 5.0 on the Hellcat for years now with no issues.

 

[Old Mopar Guy]

Thanks Mike, I did try that. I could always move the charger around but it’s just a pita.

 

[BULL]

Seems unlikely, but is one of the cables bad? Look for an internal continuity break from flexing?

If the charger isn't seeing the battery voltage correctly, then it's going to behave badly.

 

[Old Mopar Guy]

I’ll check the cords later, thanks Bull.

 

[Old Mopar Guy]

Bull for the win!!!!
While not with the cord specifically the fault was in the prongs connecting the cord from the charger to the cord permanently mounted to the battery. Thanks again Bull.